docstr: Helper function to generate an unused column name
docstr_tok: ["Helper","function","to","generate","an","unused","column","name"]
code: def generate_unused_column_name(column_names, start_with_name="col"):
      """
      Helper function to generate an unused column name
      """
      name = start_with_name
      counter = 2
      while name in column_names:
          name = f"{start_with_name}{counter}"
          counter += 1
      return name
  
file_path: cugraph/python/cugraph/cugraph/structure/number_map.py
imports: from collections.abc import Iterable
  import dask_cudf
  import numpy
  import cudf
  import warnings
label_desc: Use image node_id 3 for calling the NumberMap obj's underlying member method code with example usage: obj.generate_unused_column_name(column_names, start_with_name) and returns: name